scholarly journals EFFECTIVENESS RESEARCH ON A WAVY LAMELLAR PLATE-TYPE BIOFILTER WITH A CAPILLARY SYSTEM FOR THE HUMIDIFICATION OF THE PACKING MATERIAL APPLYING INTROINDUCED MICROORGANISMS

2014 ◽  
Vol 22 (4) ◽  
pp. 254-263 ◽  
Author(s):  
Kęstutis MAČAITIS ◽  
Antonas MISEVIČIUS ◽  
Algimantas PAŠKEVIČIUS ◽  
Vita RAUDONIENĖ ◽  
Jūratė REPEČKIENĖ
Keyword(s):  
High Efficiency ◽  
Aerodynamic Resistance ◽  
Porous Plate ◽  
Packing Material ◽  
Microbiological Activity ◽  
Treatment Efficiency ◽  
Air Treatment ◽  
New Generation ◽  
Plate Type ◽  
Pollutant Gases

To conduct research, a new generation plate-type air treatment biofilter for removing gaseous pollutants from air has been applied under laboratory conditions. A distinguishing feature of the packing material of the biofilter includes wavy lamellar polymer plates placed to each other and producing a capillary effect of humidification. While having such an arrangement, wavy lamellar plates also have rather wide spacing (6 mm), and therefore the employment of the structure of the plate-type packing material decreases the aerodynamic resistance of the device. A wavy porous plate is made of a polymer plate that ensures stiffness. Both sides of the wavy lamellar polymer plate have attached steam exploded birch fiber pellets under which, to increase plate capillarity, not-woven caulking material is put. This technological decision allows effectively enhancing the durability of the biopacking material. The work presents the results of research on the efficiency of the biodestruction process of acetone, xylene and ammonia. With reference to the conducted investigation, the high efficiency of air treatment and microbiological activity has been established. When pollutant gases (acetone, xylene and ammonia), under a velocity of 0.08 m s–1, passed through the biopacking material, microbiological activity in the material reached on average 1×108 cfu/cm2, and air treatment efficiency made 90.7%.

Air treatment efficiency of biofilter with adsorbing zeolite layer

Ekologija ◽  
2010 ◽  
Vol 56 (1) ◽  
pp. 72-78 ◽  
Author(s):  
Alvydas Zagorskis ◽  
Pranas Baltrėnas
Keyword(s):  
Treatment Efficiency ◽  
Air Treatment

scholarly journals Recent Advancements in Polythiophene-Based Materials and Their Biomedical, Geno Sensor and DNA Detection

2021 ◽  
Vol 22 (13) ◽  
pp. 6850
Author(s):  
Seyyed Mojtaba Mousavi ◽  
Seyyed Alireza Hashemi ◽  
Sonia Bahrani ◽  
Khadije Yousefi ◽  
Gity Behbudi ◽  
...  
Keyword(s):  
Biomedical Engineering ◽  
High Efficiency ◽  
Polymeric Materials ◽  
The Novel ◽  
Electrode Coating ◽  
Effective Response ◽  
Hiv Drugs ◽  
New Generation ◽  
New Compounds ◽  
Anti Hiv

In this review, the unique properties of intrinsically conducting polymer (ICP) in biomedical engineering fields are summarized. Polythiophene and its valuable derivatives are known as potent materials that can broadly be applied in biosensors, DNA, and gene delivery applications. Moreover, this material plays a basic role in curing and promoting anti-HIV drugs. Some of the thiophene’s derivatives were chosen for different experiments and investigations to study their behavior and effects while binding with different materials and establishing new compounds. Many methods were considered for electrode coating and the conversion of thiophene to different monomers to improve their functions and to use them for a new generation of novel medical usages. It is believed that polythiophenes and their derivatives can be used in the future as a substitute for many old-fashioned ways of creating chemical biosensors polymeric materials and also drugs with lower side effects yet having a more effective response. It can be noted that syncing biochemistry with biomedical engineering will lead to a new generation of science, especially one that involves high-efficiency polymers. Therefore, since polythiophene can be customized with many derivatives, some of the novel combinations are covered in this review.

scholarly journals The Bacterial Enzyme Cas13 Interferes with Neurite Outgrowth from Cultured Cortical Neurons

Toxins ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 262
Author(s):  
Qin-Wei Wu ◽  
Josef P. Kapfhammer
Keyword(s):  
Rna Editing ◽  
Cortical Neurons ◽  
High Efficiency ◽  
Primary Cultures ◽  
Cultured Neurons ◽  
Therapeutic Tool ◽  
Bacterial Enzyme ◽  
Rna Targeting ◽  
Cultured Cortical Neurons ◽  
New Generation

The CRISPR-Cas13 system based on a bacterial enzyme has been explored as a powerful new method for RNA manipulation. Due to the high efficiency and specificity of RNA editing/interference achieved by this system, it is currently being developed as a new therapeutic tool for the treatment of neurological and other diseases. However, the safety of this new generation of RNA therapies is still unclear. In this study, we constructed a vector expressing CRISPR-Cas13 under a constitutive neuron-specific promoter. CRISPR-Cas13 from Leptotrichia wadei was expressed in primary cultures of mouse cortical neurons. We found that the presence of CRISPR-Cas13 impedes the development of cultured neurons. These results show a neurotoxic action of Cas13 and call for more studies to test for and possibly mitigate the toxic effects of Cas13 enzymes in order to improve CRISPR-Cas13-based tools for RNA targeting.

Vapor-selective active membrane energy exchanger for high efficiency outdoor air treatment

2021 ◽  
Vol 295 ◽  
pp. 116950
Author(s):  
Andrew J. Fix ◽  
James E. Braun ◽  
David M. Warsinger
Keyword(s):  
High Efficiency ◽  
Outdoor Air ◽  
Air Treatment ◽  
Active Membrane ◽  
Membrane Energy

Wood Bark as Packing Material in a Biofilter used for Air Treatment

2006 ◽  
Vol 27 (12) ◽  
pp. 1297-1301 ◽  
Author(s):  
Y. Andres ◽  
E. Dumont ◽  
P. Le Cloirec ◽  
E. Ramirez-Lopez
Keyword(s):  
Packing Material ◽  
Air Treatment ◽  
Wood Bark

Industrial Sewing Machine Design and Development of Digital Design and Simulation Platform

2013 ◽  
Vol 365-366 ◽  
pp. 917-920
Author(s):  
De Fa Zhang ◽  
Yi Cong Gao
Keyword(s):  
Energy Saving ◽  
High Performance ◽  
High Efficiency ◽  
Machine Intelligence ◽  
Digital Design ◽  
Machine Design ◽  
Design And Development ◽  
Sewing Machine ◽  
Great Leap Forward ◽  
New Generation

In recent years, industrial sewing machine intelligence can be increased. Compared with the traditional equipment, the new generation of domestic equipment in the "high efficiency, energy saving, special" has realized great-leap-forward development. In the performance, will towards high precision, high efficiency, high performance, intelligent direction; in function, to the miniaturization, multi-function direction; in the program, to the systematic, integrated direction. The design and development of industrial sewing machine digitization design packaging platform are discussed.

scholarly journals Efficiency Evaluation of the Ejector Cooling Cycle using a New Generation of HFO/HCFO Refrigerant as a R134a Replacement

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2136 ◽  
Author(s):  
Bartosz Gil ◽  
Jacek Kasperski
Keyword(s):  
High Efficiency ◽  
Coefficient Of Performance ◽  
Condensation Temperature ◽  
Evaporation And Condensation ◽  
Wide Range ◽  
Theoretical Investigations ◽  
Maximum Coefficient ◽  
C 30 ◽  
New Generation ◽  
And Control

Theoretical investigations of the ejector refrigeration system using hydrofluoroolefins (HFOs) and hydrochlorofluoroolefin (HCFO) refrigerants are presented and discussed. A comparative study for eight olefins and R134a as the reference fluid was made on the basis of a one-dimensional model. To facilitate and extend the possibility of comparing our results, three different levels of evaporation and condensation temperature were adopted. The generator temperature for each refrigerant was changed in the range from 60 °C to the critical temperature for a given substance. The performed analysis shown that hydrofluoroolefins obtain a high efficiency of the ejector system at low primary vapor temperatures. For the three analyzed sets of evaporation and condensation temperatures (te and tc equal to 0 °C/25 °C, 6 °C/30 °C, and 9 °C/40 °C) the maximum Coefficient of Performance (COP) was 0.35, 0.365, and 0.22, respectively. The best performance was received for HFO-1243zf and HFO-1234ze(E). However, they do not allow operation in a wide range of generator temperatures, and, therefore, it is necessary to correctly select and control the operating parameters of the ejector.

scholarly journals MEs in Nano-Medicine

2012 ◽  
Vol 134 (06) ◽  
pp. 36-41
Author(s):  
Guy M. Genin ◽  
Ram V. Devireddy
Keyword(s):  
Tissue Engineering ◽  
Regenerative Medicine ◽  
Osteogenesis Imperfecta ◽  
High Efficiency ◽  
Medical Diagnostics ◽  
Imperial College ◽  
Current Generation ◽  
The Core ◽  
Nano Medicine ◽  
New Generation

This article reviews the use of mechanical engineering techniques in the field of nano-engineered medicines. Nano-engineered solutions now exist for a range of medical diagnostics, therapeutics, and imaging, and are at the core of many of the current generation of regenerative medicine and tissue engineering strategies. Nanoparticles can be developed to absorb energy with high efficiency from photons of certain frequency ranges. The ability to understand specific diseases such as osteogenesis imperfecta based upon such fundamental analyses has been demonstrated by ASME member Sandra Shefelbine of Imperial College London in collaboration with the Buehler group. The tools of nanotechnology have enabled mechanical engineers to engineer the beginnings of an entirely new generation of cures and therapies, and this article has discussed just a sample. In order to serve as a forum for discussion of these advances ASME is recommissioning the Journal of Nanotechnology in Engineering and Medicine.

scholarly journals Electrospinning Ag-TiO2 Nanorod-Loaded Air Treatment Filters and Their Applications in Air Purification

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3369
Author(s):  
Shan-Jiang Wang ◽  
Xiao-Yang Zhang ◽  
Dan Su ◽  
Yun-Fan Wang ◽  
Chun-Meng Qian ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
High Efficiency ◽  
Synergistic Effects ◽  
Cost Effective ◽  
Electrospinning Process ◽  
Advanced Materials ◽  
Superior Performance ◽  
Efficient Treatment ◽  
Air Treatment ◽  
Tio2 Nanorod

The efficient treatment of the problem of air pollution is a practical issue related to human health. The development of multi-functional air treatment filters, which can remove various kinds of pollutants, including particulate matter (PM) and organic gases, is a tireless pursuit aiming to address the actual needs of humans. Advanced materials and nano-manufacturing technology have brought about the opportunity to change conventional air filters for practical demands, with the aim of achieving the high-efficiency utilization of photons, a strong catalytic ability, and the synergetic degradation of multi-pollutants. In this work, visible-responding photocatalytic air treatment filters were prepared and combined with a fast and cost-effective electrospinning process. Firstly, we synthesized Ag-loaded TiO2 nanorod composites with a controlled size and number of loaded Ag nanoparticles. Then, multi-functional air treatment filters were designed by loading catalysts on electrospinning nanofibers combined with a programmable brush. We found that such Ag-TiO2 nanorod composite-loaded nanofibers displayed prominent PM filtration (~90%) and the degradation of organic pollutants (above 90%). The superior performance of purification could be demonstrated in two aspects. One was the improvement of the adsorption of pollutants derived from the increase of the specific surface area after the loading of catalysts, and the other was the plasmonic hot carriers, which induced a broadening of the optical absorption in the visible light range, meaning that many more photons were utilized effectively. The designed air treatment filters with synergistic effects for eliminating both PM and organic pollutants have promising potential for the future design and application of novel air treatment devices.

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